I don't consider Witcher 3 a true RPG to be completely honest. A static main character and lack of classes, or any really deep character building, hold it back for me in that regard. I consider it an action game with RPG elements that, lets be honest, almost every game has in this day and age.
Doesn't stop it from being one of the best games I've played, but I honestly find the game to be pretty shallow in its gameplay. There's only a handful of armors that actually look decent, no matter what "build" you go for you never lose access to abilities, and the gameplay is really simplistic and easy. Death March lost all semblence of difficulty after I became Lv3. The game shines when its dealing in its story, characters, and side quests, but on a gameplay aspect I don't consider it anything special.